k0kubun	2018-07-25 21:33:38 +0900 (Wed, 25 Jul 2018)

  New Revision: 64050

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=64050

  Log:
    mjit.c: prevent memory leak on realloc failure

  Modified files:
    trunk/mjit.c
Index: mjit.c
===================================================================
--- mjit.c	(revision 64049)
+++ mjit.c	(revision 64050)
@@ -327,15 +327,18 @@ form_args(int num, ...) https://github.com/ruby/ruby/blob/trunk/mjit.c#L327
     va_list argp;
     size_t len, n;
     int i;
-    char **args, **res;
+    char **args, **res, **tmp;
 
     va_start(argp, num);
     res = NULL;
     for (i = len = 0; i < num; i++) {
         args = va_arg(argp, char **);
         n = args_len(args);
-        if ((res = (char **)realloc(res, sizeof(char *) * (len + n + 1))) == NULL)
+        if ((tmp = (char **)realloc(res, sizeof(char *) * (len + n + 1))) == NULL) {
+            free(res);
             return NULL;
+        }
+        res = tmp;
         MEMCPY(res + len, args, char *, n + 1);
         len += n;
     }

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